At the end of the lesson, the students should be able to: 1. Draw a frequency Distribution table 2. Draw a Histogram
Previous knowledge
The students know how to draw bar Charts, pie Charts Using the Computer.
Introduction
Teacher introduces the lesson
Presentation
Teacher presents the lesson in steps
Step 1
Teacher identifies grouped data as one that is too much to deal with individually. Example1. The heights of 36 students in a class is given as : 146, 148 149 150 151 153 154 155 155 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 172 173 174 176 177 178 179 180 181 183 183 185
Step 2
Teacher gives an example of drawing a frequency distribution table
Class interval
frequency
145 – 154
6
155 - 164
9
165 - 174
15
175 – 184
5
185 – 194
1
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Step 3
Teacher explains drawing oh histogram
Class interval
frequency
Class boundary
145 – 154
6
144.5 - 154.5
155 - 164
9
154.5 -164.5
165 - 174
15
164.5 - 174.5
175 – 184
5
174.5 - 184.5
185 – 194
1
184.5 -194.5
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Frequency is plotted against class boundary.
Evaluation
Teacher refers student to Question Bank
Question 1 Question: By using a of scale 1cm=10% , draw a histogram of the following data: Answer: The required histogram representing the given data is shown in graph.
Question 2 Question: Draw a histogram of the following frequency table. Answer: On the basis of data, we will first prepare the table of continuous classes and then draw the required histogram.
Conclusion
The lesson of the day is on Grouped Data and the use of frequency distribution in drawing the Histogram.
Assignment
Teacher refers question bank for assignments.
References
Books
Author Name
Title
Publishing Year
Page Number
Mara N. et al
New School Mathematics For Senior Secondary Schools
482
J.B. Channon et al
New general Mathematics for senior secondary schools 1
Josiah Olowoeso
Multipurpose Mathematics
July 2001
194 - 210
Text
Internet Articles
Author Name
Title or Topic
Publishing date/ or information access date
URL Address
Statistics Tutorial: Bar Charts and Histograms
March 2009
www.startrek.com/AP Statistics Tutorial Bar Charts and Histograms.htm
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Answer: The required histogram representing the given data is shown in graph.
Question 2 Question: Draw a histogram of the following frequency table.
Answer: On the basis of data, we will first prepare the table of continuous classes and then draw the required histogram.